1.首先定义了一个枚举2.然后在AppBar的「actions」里定义了PopupMenuButton3.设置 icon 为Icon(Icons.more_vert)4.itemBuilder需返回一个List<PopupMenuEntry<T>>5.这里传入的值就是PopupMenuItem<WhyFarther>6.然后定义onSelected参数接收点击回调 这样整体的逻辑就是定义好了,运行一下: 总结 这样就完成了一个...
Widgetbuild(BuildContext context){returnnewScaffold(appBar:AppBar(title:Text('PopMenuDemo'),actions:<Widget>[_NomalPopMenu()],),body:Center(child:newText(_bodyStr)));}Widget_NomalPopMenu(){returnnewPopupMenuButton<String>(itemBuilder:(BuildContext context)=><PopupMenuItem<String>>[newPopupMen...
( appBar: AppBar( title: Text("Dialog Page"), ), body: PopupMenuButtonDemo(), ), ); } } class PopupMenuButtonDemo extends StatelessWidget { const PopupMenuButtonDemo({Key? key}) : super(key: key); @override Widget build(BuildContext context) { return Center( child: PopupMenuButton<...
Widgetbuild(BuildContext context){returnnewScaffold(appBar:AppBar(title:Text('PopMenuDemo'),actions:<Widget>[_NomalPopMenu()],),body:Center(child:newText(_bodyStr)));}Widget_NomalPopMenu(){returnnewPopupMenuButton<String>(itemBuilder:(BuildContext context)=><PopupMenuItem<String>>[newPopupMen...
PopupMenuItem为单个item的弹出样式,默认为48px高,可根据需求自行定义。item中可以自定义需要的样式,包括文字图片等一系列样式。 @override Widget build(BuildContext context) { return new Scaffold( appBar: AppBar( title: Text('PopMenuDemo'),
点击AppBar 右上角的按钮,弹出一个菜单供用户选择。 幸运的是,Flutter 提供给我们了一个Widget,直接就能实现如上的效果。 PopupMenuButton 还是老规矩,先看官方的说明: Displays a menu when pressed and calls onSelected [1] when the menu is dismissed because an item was selected. The value passed to ...
appBar: AppBar( title: Text('PopMenuDemo'), actions: <Widget>[_NomalPopMenu()], ), body: Center(child: new Text(_bodyStr))); }Widget _NomalPopMenu() { return new PopupMenuButton<String>( itemBuilder: (BuildContext context) => <PopupMenuItem<String>>[ new PopupMenuItem<String>(...
PopupMenuItem 基本样式 PopupMenuItem为单个item的弹出样式,默认为48px高,可根据需求自行定义。item中可以自定义需要的样式,包括文字图片等一系列样式。 @override Widgetbuild(BuildContext context){returnnewScaffold(appBar:AppBar(title:Text('PopMenuDemo'),actions:<Widget>[_NomalPopMenu()], ...
flutter PopupMenuItem 下划线 flutter 底部弹出 码个蛋(codeegg)第 607 次推文 Flutter系列文章: 《Flutter 入门指北(Part 1)之 Dart》 《Flutter 入门指北(Part 2)之基础部件》 《Flutter 入门指北(Part 3)之 Appbar,Scaffold 填坑》 《Flutter 入门指北(Part 4)之容器部件》...
PopupMenuItem为单个item的弹出样式,默认为48px高,可根据需求自行定义。item中可以自定义需要的样式,包括文字图片等一系列样式。 @overrideWidgetbuild(BuildContextcontext) {returnnewScaffold(appBar:AppBar(title:Text('PopMenuDemo'),actions: <Widget>[_NomalPopMenu()], ...